Hi,
I have an older road bike, 80's era with square taper bb. It's geared 42/52 up front and 14-28 in the back, which is fine for most riding, but there are some hills around where I would need to stand up in this configuration. Furthermore, I would like to move from 170mm crank arms to 165, which from what I've read, is the right size for me. The rear end dropouts are not wide enough to bump up to a modern cassette with lower gear ratios, so I'm focused on the front end.
Thus far, the only crankset I've found that offers square taper, 165mm, and lower tooth count chainrings is the low wide model from Sugino. For $140, you can get it with 165mm crank arms, but the chain rings are 26 / 40. The 40 as an upper range would probably be ok, I would be coasting a bit, however the 26 might be a little low. So I looked at other chainrings (rivbike.com) and they offer a 74x32T for the low, but then I'm getting close to $200 for the crankset on a bike I will not ride all that often.
So my question is this: is there a company that will let you specify a crankset where you pick your crank arm length, and the tooth count on each chainring?

And for another question, I'm considering replacing the triple crankset on my mountain bike with a Sugino triple with 165 crank arms. At some point, I'm looking to build out a new bike with a touring or cross frame, like a Soma Soga, LHT, etc., but I'm looking to buy some of the drivetrain gear now and update my current ride to test it out so to speak, as opposed to ordering a frame and entire kit which will be close to 2 grand. I have noticed most current bikes have splined bottom brackets and cartridges. If I get the Sugino, which is square taper, will that limit me to any frame I may purchase in the future? Or will it just mean that for whatever frame I buy, I'll need a square taper bottom bracket? I mention this because I've seen Shimano compact doubles with 165 crank arms, but they are mostly 39 / 50, which is a bit high for me.
Thanks in advance.
Jon